diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -2813,6 +2813,9 @@ static Vehicle *FindTrainCollideEnum(Veh
 	/* not a train or in depot */
 	if (v->type != VEH_TRAIN || Train::From(v)->track == TRACK_BIT_DEPOT) return NULL;
 
+	/* do not crash into trains of another company. */
+	if (v->owner != tcc->v->owner) return NULL;
+
 	/* get first vehicle now to make most usual checks faster */
 	Train *coll = Train::From(v)->First();